To see RH waves in rotating superfluids with quantized vortices
clearly, we first consider the point-vortex model on a 2D
spherical surface [1]}, [2]}, [3]}, [4]}, [5]}.
The numerical cost of the point-vortex simulation is much lower than
that of the GP simulation, which enables the treatment of large
numbers of vortices.
In the limit of an infinite density of point vortices, the model
reduces to the classical continuous vorticity discussed in the
previous section.
